66525365 has 16 divisors (see below), whose sum is σ = 84342720. Its totient is φ = 50232960.

The previous prime is 66525359. The next prime is 66525383. The reversal of 66525365 is 56352566.

It is not a de Polignac number, because 66525365 - 2¹⁶ = 66459829 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28025 + ... + 30305.

It is an arithmetic number, because the mean of its divisors is an integer number (5271420).

Almost surely, 2^66525365 is an apocalyptic number.

It is an amenable number.

66525365 is a deficient number, since it is larger than the sum of its proper divisors (17817355).

66525365 is a wasteful number, since it uses less digits than its factorization.

66525365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2612.

The product of its digits is 162000, while the sum is 38.

The square root of 66525365 is about 8156.3082948108. The cubic root of 66525365 is about 405.1934553095.

The spelling of 66525365 in words is "sixty-six million, five hundred twenty-five thousand, three hundred sixty-five".